Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 509 [Rate centres in NPA 509] [Dial plan for NPA 509]

NXX: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
509-204 A Walla Walla WA SPKNWA01XXX  483E ONVOY, LLC - WA 676      
509-204 0 Walla Walla WA   483E ONVOY, LLC - WA 676      
509-204 1 Walla Walla WA   483E ONVOY, LLC - WA 676      
509-204 2 Walla Walla WA   483E ONVOY, LLC - WA 676      
509-204 3 Walla Walla WA   483E ONVOY, LLC - WA 676      
509-204 4 Walla Walla WA   483E ONVOY, LLC - WA 676   2016-05-22   
509-204 5 Walla Walla WA   483E ONVOY, LLC - WA 676      
509-204 6 Walla Walla WA   483E ONVOY, LLC - WA 676   2016-05-22   
509-204 7 Walla Walla WA   006F BANDWIDTH.COM CLEC, LLC - WA 676   2017-02-25   
509-204 8 Walla Walla WA   159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 676   2019-03-13   
509-204 9 Walla Walla WA   483E ONVOY, LLC - WA 676   2016-04-08   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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